Re: Receiving error 0x800408FC

Can not receive mail after spending hours with Customer Security Assurance service tech. Sending is fine

using 995 and 465 ports

error 0x800408fc continues

WHAT CAN I DO??

Did you check "this server requires authentication? Did you enable SSL for both ports?

Need Email Help? Please post the following information in your post.Do you use XfinityConnect? The Full or Lite version?Do you use an email client? Which one? (Eg; Windows Live mail, Outlook, a smartphone etc.)Which browser/version do you use? And- have you cleared your browser cache?Which operating system? XP, Vista, Windows 7, Mac OS XDetails of the problem you are having.

Re: Receiving error 0x800408FC

The problem is that the mail.comcast.net no longer responds to the IPv4 address, and instead only works with the IPv6 address on their DNS servers. Since most computers still use the IPv4 address, it will only work if you put the actual server address instead of mail.comcast.net.

I looked them up today and they are:

76.96.40.158

68.87.26.158

So go into your mail client, change account settings and replace mail.comcast.net with one of those IPv4 addresses. It will work until they change the address.

Re: Receiving error 0x800408FC

The Post previously worked like a charm. Had I not a background in IT the code,0x800408FC, and finding the solution would have been a big problem. Why comcast can't fix this is beyond me since its a DNS resolution issue for the server name mail.comcast.net... And they want to build high tech labs.. Right..

Re: Receiving error 0x800408FC

Dbatech wrote:

The Post previously worked like a charm. Had I not a background in IT the code,0x800408FC, and finding the solution would have been a big problem. Why comcast can't fix this is beyond me since its a DNS resolution issue for the server name mail.comcast.net... And they want to build high tech labs.. Right..

There's nothing that needs to be fixed by Comcast, the problem is with Outlook. Older versions of Outlook have problems with IPv6. IPv6 enabled systems will ask for the IPv6 address of mail.comcast.net, Comcast will give them the IPv6 address, and then Outlook will gag. It doesn't make sense to me that Outlook would even have a clue about which version of IP was in use, but that's the way it is. And, if I remember right, this problem only pops up when receiving email, not when sending email. Very strange.

Re: Receiving error 0x800408FC

I am not very computer savvy. I read about how people unchecked some ipv6 block and emails started coming in again. I have outlook 2003 and windows vista. The step-by-step instructions aren't clear. when I open network and sharing, there is no place for me to change network adapters. can you please help me?

Re: Receiving error 0x800408FC

Folks,

It is HIGHLY recommended that you not disable IPv6 as it will only lead to more problems down the road. We understand that folks are comfortable with their email software, but realize that the issue is with Outlook 2003, a software product released 11+ years ago and saw Microsoft end support back in 2009.

It is recommend that anyone experiencing this issue upgrade to a more modern email client.

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Re: Receiving error 0x800408FC

ComcastJordan, While you are certainly correct that IPV6 is the new, and proper, standard, it seems unfortunate that Comcast is willing to force a large number of users to make a difficult, expensive, and probably unnecessary change to their existing email clients. I, too have Outlook 2003 in Windows 7, and have had problems with receiving emails through Outlook for the past two to three months. Recently, the error would disappear at some point during the day, only to reappear ther following morning. Is there a problem getting the mail.comcast.net address to propagate through the DNS servers? Do you expect this back-and-forth behavior to continue for an extended period?

I have to agree that the phone-in technical support was a terrible waste of time for both me and the tech, who kept trying to tell me that "...of course the POP3 server was working fine: you could not get your email through the web interface otherwise"

Re: Receiving error 0x800408FC

it seems unfortunate that Comcast is willing to force a large number of users to make a difficult, expensive, and probably unnecessary change to their existing email clients.

Don't look at Comcast. It is a problem with Microsoft Outlook 2003, which is an outdated and end of life mail client.

Windows 7 also went end of mainstream support last week too...

There are plenty of free alternatives if you don't want to purchase an updated version from Microsoft.

Microsoft also recommend against disabling IPv6, particularly in Windows 8, as there are certain OS functions related to LAN connectivity which rely on it,apparently.

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Re: Receiving error 0x800408FC

ddm23 wrote:

ComcastJordan, While you are certainly correct that IPV6 is the new, and proper, standard, it seems unfortunate that Comcast is willing to force a large number of users to make a difficult, expensive, and probably unnecessary change to their existing email clients. I, too have Outlook 2003 in Windows 7, and have had problems with receiving emails through Outlook for the past two to three months. Recently, the error would disappear at some point during the day, only to reappear ther following morning. Is there a problem getting the mail.comcast.net address to propagate through the DNS servers? Do you expect this back-and-forth behavior to continue for an extended period?

I have to agree that the phone-in technical support was a terrible waste of time for both me and the tech, who kept trying to tell me that "...of course the POP3 server was working fine: you could not get your email through the web interface otherwise"

ddm23,

I do understand your frustration, but Outlook 2003 is not a supported product by Microsoft. We need to continue to evolve our network to ensure better overall performance. IPv6 is one such evolution, which becomes extremely important in the era of an internet of things (http://en.wikipedia.org/wiki/Internet_of_Things).

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